I'm pretty sure it was mentioned that Tamriel was one super-continent, and then it was blasted apart during the Ehlnofex Wars.

source please?

Eventually, the wandering Ehlnofey found the hidden land of Old Ehlnofey, and were amazed and joyful to find their kin living amid the splendor of ages past. The wandering Ehlnofey expected to be welcomed into the peaceful realm, but the Old Ehlnofey looked on them as degenerates, fallen from their former glory. For whatever reason, war broke out, and raged across the whole of Nirn. The Old Ehlnofey retained their ancient power and knowledge, but the Wanderers were more numerous, and toughened by their long struggle to survive on Nirn. This war reshaped the face of Nirn, sinking much of the land beneath new oceans, and leaving the lands as we know them (Tamriel, http://www.uesp.net/wiki/Lore:Akavir, http://www.uesp.net/wiki/Lore:Atmora, and http://www.uesp.net/wiki/Lore:Yokuda). The Old Ehlnofey realm, although ruined, became Tamriel. The remnants of the Wanderers were left divided on the other 3 continents.

Ah, and soon enough we shall be discussing molecules in the Elder Scrolls universe.

Ah, and soon enough we shall be discussing molecules in the Elder Scrolls universe.

Wait and see.

The Annotated Anuad.

As for your question about plate tectonics, Nirn only has, what, 6,000 years of history? If there is such a thing, there simply hasn't been enough time to measurably observe it's effects.

It only has a short linear history, but it was presumably still in existence before time solidified. As far as I can see, that's essentially limitless 'time' for tectonics to occur (in the strange non-linear sense that we can't explain).

We don't even know if the continents are on tectonic plates. Nirn is only a round, spherical planet to limited eyes. It is also a plane or dimension and at least one major volcano is explicitly magical. The geography all makes sense, but nature, in Tamriel, is gods blowing crap up and that causing things to happen.

Good point, I was thinking the same thing. But at the same time, we can't simply say with certainty that Nirn is a magic ball of grass and leave it at that. The inhabitants of Nirn have postulated that the two moons are infinite planes that our mortal minds perceive as circles floating in the sky - but what if they're wrong? They might be just as confused as we were before people like Galileo started coming along.

Because they've been on the moons.

Creatia is made out of two types of Atomos particles: Positively charged Anutron and negatively charged Daedrons. Anutrons naturally decay into Daedrons as entropy takes it's effect on particles. Restoration spells simply work by converting Daedrons into Anutrons. Without a constant influx of Magicka radiation from Aetherius, the Mundus will collapse as all matter begins Daedron Decay.

When did anyone on Tamriel go specifically to the moons?

I understand they've traveled to many other plane(t)s in Oblivion, but the moons?

http://www.imperial-library.info/content/pocket-guide-empire-third-edition-magic-aetherius speaks of mananauts.

Good point, I was thinking the same thing. But at the same time, we can't simply say with certainty that Nirn is a magic ball of grass and leave it at that. The inhabitants of Nirn have postulated that the two moons are infinite planes that our mortal minds perceive as circles floating in the sky - but what if they're wrong? They might be just as confused as we were before people like Galileo started coming along.

Good point, I was thinking the same thing. But at the same time, we can't simply say with certainty that Nirn is a magic ball of grass and leave it at that. The inhabitants of Nirn have postulated that the two moons are infinite planes that our mortal minds perceive as circles floating in the sky - but what if they're wrong? They might be just as confused as we were before people like Galileo started coming along.

When did anyone on Tamriel go specifically to the moons?

I understand they've traveled to many other plane(t)s in Oblivion, but the moons?

There is simply no evidence to suggest anything contrary.